Pin tumbler lock



Patented Apr. 25, I899. F. & H. F. KEIL.

PIN TUMBLEB LOCK.

(Application filed Feb. 1 9

3 Sheets-Sheet I.

(No Model.)

70%!72 ass 9 I No. 623,674. Patented Apr. 25, I899. F. & H. F. KEIL.

PIN TUMBLER LOCK.

(Application filed Feb. 18, 1898.) (No Model.) 3 Sheets-Sheat 2.

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WITNESSES. f! Aid J WW1- BY dam/LL A TTOHNE).

No. 623,674. Patented Apr. 25, I899. F. &. H. F. KEIL.

PIN TUMBLER LOCK.

(Application filed. Feb. 18, 1898.)

(No Model.) 3 Sheets-Sheai 3.

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ilnrrnn STATES PATENT @rrrcn.

FRANCIS KEIL AND HENRY FRANCIS KEIL, OF NEW YORK, N. Y.

PIN-TUMBLER LOCK.

SPECIFICATION forming part of Letters Patent No. 623,674, dated April25, 1899.

Application filed February 18,1898. Serial No. 670,828. (No model.)

To all whom it may concern:

Be it known that we, FRANCIS KEIL and HENRY FRANCIS KEIL, citizens ofthe United States of America, and residents of the borough of Bronx,city, county, and State of New York, have invented new and usefulImprovements in Pin-Tu1nbler Locks, of which the following is aspecification.

Our invention relates to the class of looks known in the art aspin-tumbler locks.

Heretofo re in the manufacture of this class of looks it has been thepractice to cast arough blank for the key-hub and also a rough blankforthesurroundingtumbler-cylinder. Itwas then necessary to drillsuitable openings or seats in each blank for the pin-tumblers, bore theopening in the tumbler-cylinder for the key-hub, plane or cut the keywayin the keyhub, cut screw-threaded holes in the rear of the key-hub, cutexternal peripheral screwthreads on the cylinder, and trim and finishthe hub and cylinder in order to adapt the two parts to work smoothlytogether. In manufacturing locks of this character it is apparent thatthe cost of production is very great owing to the many differentoperations necessary before the key-hub and tumbler-cylinder areproperly constructed and in condition to properly cooperate.

The object of our present invention is to avoid and dispense with allthese (at present) necessary operations and to produce a lock of thischaracter complete and finished by a single operation. The great expenseand labor involved in the various mechanical steps and operations atpresent necessary in order to provide the essential characteristicfeatures of construction are thereby dispensed withand the cost ofproduction greatly lessened. Further than this the polishing andfinishing of the face of the look at present necessary can be avoided,as the entire external surface of the lock is provided with a smooth andfinished appearance at the same time that it is provided with theessential features of construction.

We will now refer to the drawings forming a part of this specificationfor a more detailed description of the invention.

Figure 1 represents a longitudinal sectional view of the pin-tumblercylinder as it is removed from the mold. Fig. 2 is a perspective view ofsuch cylinder. Fig. 3 is a front view, and Fig. 4 a longitudinalsectional view, of the key-hub. Figs. 5 and 6 are respectively a rearand a sectional view of said key-hub. Fig. 7 is a plan View of a moldused in constructing the tumbler-cylinder. Fig. 8 is a view of the mold,partly in section, on line 2 2 of Fig. 7. Fig. 9 is a view, partly insection, of the mold for the keyhub with the core for the keyway inposition; and Fig. 10 is a similar view with the core removed. Fig. 11is a horizontal section on line 13 13 of Fig. 9,'and Fig. 12 is asimilar sectional view on line 14 14 of Fig. 9.

In the above figures, A represents the pintumbler cylinder provided withthe integral face-plate a.

a is the opening for the rotary key-hub B. Intersecting this opening isa series of openingsa forming tumbler-seats for the usual pin-tumblersand their springs. Surrounding the rear end of the external periphery ofthe cylinder A is the screw-thread a for se curing the cylinder to thelock-case. The usual side recesses in the side of this cylinder for theretaining means are shown at a and the recess at the top of the tumblerseats or openings for the spring-retaining plate is shown at 04 Thekey-hub B is provided with the longitudinal recess for the key at b, andthis may be of any suitable shape, and the usual screwholes in the rearof the key-hub for the screws for'securing the collar or cam to the hubare shown at 12 The various features of the key-hub and tumbler-cylinderabove specifically referred to by reference-letter-such as the tumblerseats or openings, keyway in the key-hub, screw-threads, opening in thetumbler-cylinder for the key-hub, &c.have heretofore been added to therough blanks after such blanks have been removed from the mold, and ithas usually required a separate and distinct mechanical operation toprovide each of said features of construction. This necessarily requiredconsiderable time and comparatively great expense in order to producethe complete and finished tumbler-cylinder and key-hub and have them incondition to be assembled for cooperation. We avoid and dispense withall these different mechanical operations at present necessarilyinvolved in completing the construction of said key hubs andcyliuders-su ch as cutting recesses,screwthreads, tumbler openings orseats, the keyway, &e.by providing each of said parts to wit, thekey-hub and tumbler-eyliuder with all the necessary operativecharacteristic features of construction complete and finished in theprocess of casting, whereby upon the removal from the mold both thekey-hub and tumbler-cylinder are complete, smooth, and finished, andready-for operative assembling. \Ve thereby produce an article ofmanufacture never before produccd-i. c., a castmctal tumbler-cylinderand key-hub formed complete and finished in the process of casting andready for cooperation without additional change in construction. Theutility and advantages of this tumbler-cylinder and key-hub formedcomplete and finished in the process of cast ing will be apparent. Thelabor saved in their production and their comparative cheapuess will beperfectly obvious to those familiar with the art. \Ve have illustratedin Figs. 7 to 12 the construction of molds employed by us for producingthis complete and finished tumbler-eylinderand keyhub. It is obvious,however, that this exact construction of mold is not essential to theproduction of our complete and finished cylinder and key-hub, as it canbe varied and changed in many particulars. Itis onlyillus- 1 rated,however, in order to disclose our means of carrying out our invention.

F is a bed-plate for the cylinder-mold, having a recess on its top siderunning from end to end and having beveled sides to receive the sectionsof the mold G and keep them in place. The center of the recess isprovided with a circular recessf to receive the circular die f Die f hasa circular recess f to receive the end of the core f*. The core isprovided with the pin-hole formers f.

I is the bed-plate of the key-hub mold, having a recess in its faceprovided with inwardlybeveled sides, in which slide the two sections IIII of the mold. In the center ofthe recess is provided a circular recess1' to receive the disk i which disk has raised shoulders across thecenter of its rear end to form a shed to receive the usual cam that fitson the keyhub. At each side of the disk is provided a J is the hub-coreand is provided with the pin-hole studs to form the pin-holes in thekey-hub to receive the pin-tumblers.

K is the keyway-former for the key-hub and may be of any desired shapeand form the keyway of the key-hub which runs longitudinally through thekey-hub.

It will be seen that these molds are formed of several detachable parts,and when such parts are brought into proper position the metal or othermaterial of which the cylinder and hub are made is poured into the moldat the opening 71 A more detailed description of the construction ofthis mold is not deemed essential at this time, since it is thought fromthe generaldisclosure here given the construction and operation will besufficiently understood to aid in the understanding of this invention.The construction of this mold is not herein claimed, since it forms thesubject of another application, filed by us September 3, 1898, SerialNo. 690,216.

Having described our invention, what we desire to claim as new is 1. Asan article of manufacture, a tumblercylinder for pin-locks having thepin tumbler openings formed therein complete and finished in the processof casting, substantially as set forth.

2. As an article of manufacture, a tumblercylinder for pin-locks, havingall the essential features of construction, such as thetumbleropenings,key-h ub opening,screw-threads and recesses all formedcomplete and finished in the process of casting, substantially as setforth.

As an article of manufacture, a key-hub for pin-locks made in a singlepiece and having the keyway-slot and tumbler openings or seats formedcomplete and finished in the process of casting substantially asdescribed.

4:. As an article of manufacture,,a pin-tumbler cylinder and key-hub,each cast complete and finished with the usual tumbler-seats, keyway andscrew -threads whereby such parts as cast are adapted for cooperationwithout additional change in construction, substantially as set forth.

In testimony that we claim the foregoing as our invention we have signedour names, in presence of two witnesses, this letill day of February,1898.

FRANCIS KEIL. v HENRY FRANCIS KEIL. \Vitnesses:

ADAM E. SCI'IATZ, WM. L. ALLEN.

